docs: def from_qs(cls, qs, **kwargs):
          """
          Creates a new queryset using class `cls` using `qs'` data.
  
          :param qs: The query set to clone
          :keyword kwargs: The kwargs to pass to _clone method
          """
          assert issubclass(cls, QuerySet), "%s is not a QuerySet subclass" % cls
          assert isinstance(qs, QuerySet), "qs has to be an instance of queryset"
          return qs._clone(klass=cls, **kwargs)